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- Title
HDAC6 involves in regulating the lncRNA-microRNA-mRNA network to promote the proliferation of glioblastoma cells.
- Authors
Wu, An-Chih; Yang, Wen-Bin; Chang, Kwang-Yu; Lee, Jung-Shun; Liou, Jing-Ping; Su, Ruei-Yuan; Cheng, Siao Muk; Hwang, Daw-Yang; Kikkawa, Ushio; Hsu, Tsung-I; Wang, Chih-Yang; Chang, Wen-Chang; Chen, Pin-Yuan; Chuang, Jian-Ying
- Abstract
Background: Glioblastoma (GBM) is the most aggressive and lethal brain tumor. Although the histone deacetylase (HDAC)/transcription factor axis promotes growth in GBM, whether HDACs including HDAC6 are involved in modulating long non-coding RNAs (lncRNAs) to affect GBM malignancy remains obscure. Methods: Integrative analysis of microarray and RNA-seq was performed to identify lncRNAs governed by HDAC6. Half-life measurement and RNA-protein pull-down assay combined with isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomic analysis were conducted to identify RNA modulators. The effect of LINC00461 on GBM malignancy was evaluated using animal models and cell proliferation-related assays. Functional analysis of the LINC00461 downstream networks was performed comprehensively using ingenuity pathway analysis and public databases. Results: We identified a lncRNA, LINC00461, which was substantially increased in stem-like/treatment-resistant GBM cells. LINC00461 was inversely correlated with the survival of mice-bearing GBM and it was stabilized by the interaction between HDAC6 and RNA-binding proteins (RBPs) such as carbon catabolite repression—negative on TATA-less (CCR4-NOT) core exoribonuclease subunit 6 and fused in sarcoma. Targeting LINC00461 using azaindolylsulfonamide, an HDAC6 inhibitor, decreased cell-division-related proteins via the lncRNA-microRNA (miRNA)-mRNA networks and caused cell-cycle arrest, thereby suppressing proliferation in parental and drug-resistant GBM cells and prolonging the survival of mice-bearing GBM. Conclusions: This study sheds light on the role of LINC00461 in GBM malignancy and provides a novel therapeutic strategy for targeting the HDAC6/RBP/LINC00461 axis and its downstream effectors in patients with GBM.
- Subjects
CELL proliferation; LINCRNA; RNA-binding proteins; HISTONE deacetylase; BRAIN tumors; CELL cycle proteins; METHYLGUANINE
- Publication
Journal of Experimental & Clinical Cancer Research (17569966), 2022, Vol 41, Issue 1, p1
- ISSN
1756-9966
- Publication type
Article
- DOI
10.1186/s13046-022-02257-w